alt Hacker NewsThen you’re dealing with a lot of labor to do the switches (and arrange sales of used equipment), plus capital float costs while you do it.
It can make sense at a certain scale, but it’s a non trivial amount of cost and effort for potentially marginal returns.
Building a new data center and getting power takes years to double your capacity. Swapping out out a rack that is twice as fast takes very little time in comparison.